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Income Taxes (Tables)
12 Months Ended
Sep. 30, 2024
Income Tax Disclosure [Abstract]  
Significant Components of Company's Income Tax Provision from Continuing Operations
The components of the Company’s income tax provision from continuing operations are as follows (in millions):
 202420232022
Tax expense at Ireland statutory rate of 12.5%
$190 $139 $139 
U.S. state income tax, net of federal benefit42 30 (26)
Income subject to the U.S. federal tax rate
63 42 (101)
Income subject to rates different than the statutory rate(204)44 67 
Reserve and valuation allowance adjustments(139)(559)(301)
Intellectual property transactions and adjustments— (176)— 
Impact of acquisitions and divestitures121 — — 
Restructuring and impairment costs38 12 40 
Income tax provision (benefit)$111 $(468)$(182)
Effective tax rate%(42)%(16)%
Summary of Changes in Valuation Allowance
The following table summarizes changes in the valuation allowance (in millions):
202420232022
Balance at beginning of period$6,279 $5,906 $5,812 
Allowance provision for new operating and other loss carryforwards215 544 306 
Allowance reductions(236)(171)(212)
Balance at end of period$6,258 $6,279 $5,906 
Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits
A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in millions):
202420232022
Beginning balance, October 1$2,158 $2,485 $2,678 
Additions for tax positions related to the current year39 59 164 
Additions for tax positions of prior years53 89 31 
Reductions for tax positions of prior years(35)(23)(47)
Settlements with taxing authorities(35)(6)(7)
Statute closings and audit resolutions(127)(446)(334)
Ending balance, September 30$2,053 $2,158 $2,485 
Summary of Income Tax Contingencies
The following table summarizes tax effected unrecognized tax benefits that, if recognized, would impact the effective tax rate and the related accrued interest, net of tax benefit (in millions):
September 30,
202420232022
Tax effected unrecognized tax benefits that, if recognized, would affect the effective tax rate$1,466 $1,533 $1,935 
Net accrued interest398 329 281 
Tax Jurisdictions and Years Currently under Audit Exam
In the U.S., fiscal years 2019 through 2020 are currently under audit and fiscal years 2017 through 2018 are currently under appeal with the Internal Revenue Service (“IRS”) for certain legal entities. In addition, fiscal years 2016 through 2019 are also under exam by the IRS in relation to a separate consolidated filing group. Additionally, the Company is currently under exam in the following major non-U.S. jurisdictions for continuing operations:
 
Tax JurisdictionTax Years Covered
Belgium2016 - 2017; 2019-2020
Germany
2007 - 2021
Mexico2016 - 2019
United Kingdom
2014 - 2015; 2018; 2020 - 2021
Components of Provision for Income Taxes on Continuing Operations
Selected income tax data related to continuing operations were as follows (in millions):
 202420232022
Components of income (loss) from continuing operations before income taxes:
U.S. $(406)$(325)$(27)
Non-U.S.1,928 1,438 1,139 
Income from continuing operations before income taxes$1,522 $1,113 $1,112 
Components of the provision (benefit) for income taxes:
Current
U.S. federal$330 $(201)$(237)
U.S. state86 94 47 
Non-U.S.102 289 199 
518 182 
Deferred
U.S. federal(299)(267)(173)
U.S. state(26)(25)(70)
Non-U.S.(82)(358)52 
(407)(650)(191)
Income tax provision (benefit)$111 $(468)$(182)
Income taxes paid $704 $294 $439 
Deferred Taxes Classified in Consolidated Statements of Financial Position
Deferred taxes were classified in the consolidated statements of financial position as follows (in millions):
 September 30,
 20242023
Other noncurrent assets$1,969 $1,480 
Other noncurrent liabilities(301)(316)
Net deferred tax asset$1,668 $1,164 
Temporary Differences and Carryforwards in Deferred Tax Assets and Liabilities
Temporary differences and carryforwards which gave rise to deferred tax assets and liabilities included (in millions):
 
 September 30,
 20242023
Deferred tax assets
Accrued expenses and reserves$661 $469 
Employee and retiree benefits43 88 
Property, plant and equipment729 638 
Net operating loss and other credit carryforwards6,628 6,667 
Research and development219 171 
Intangible assets306 — 
Operating lease liabilities294 341 
Other, net455 269 
9,335 8,643 
Valuation allowances(6,258)(6,279)
3,077 2,364 
Deferred tax liabilities
Subsidiaries, joint ventures and partnerships440 359 
Intangible assets— 248 
Operating lease right-of-use assets294 341 
Other liabilities675 252 
1,409 1,200 
Net deferred tax asset$1,668 $1,164